What is an AV Block? (Pediatric ACLS)

First-degree AV block:

In this condition, there is a delay of the electrical impulse reaching the lower chambers of the heart. It is not a complete heart block, merely a delay in conduction producing prolongation of the PR interval on the surface electrocardiogram. First-degree AV block is rare but may be seen in young, healthy adults, especially well-trained athletes owing to an increase in vagal tone. Patients are generally asymptomatic. In pediatrics it may be seen with certain types of congenital heart defects, after heart surgery or closure of an atrial septal defect, following catheter ablation, muscular dystrophy, rheumatic fever, lupus, rheumatoid arthritis, Lyme disease, tuberculosis, endocarditis, diphtheria, medications, coronary disease, heart failure and degenerative diseases of the electrical conduction system.

Syncope and Heart Palpitation in teenager

A 19-year-old white male presents to the emergency department (ED) in Connecticut after an episode of shortness of breath and syncope while at home. He reports having experienced recurrent episodes of palpitations and fatigue in the week before presentation. Yesterday, the patient sought medical attention for these symptoms at his pediatrician’s office. An electrocardiogram (ECG) was performed, but it was normal; the patient was sent home wearing a Holter monitor (also known as an ambulatory electrocardiography device). Today, while mowing the lawn, the patient again felt a sudden onset of palpitations, accompanied by shortness of breath and light-headedness. He went inside the house, where he suddenly “passed out” (according to the patient’s girlfriend). The girlfriend also states that he was unresponsive for a couple of minutes and that the patient exhibited no seizurelike activity or incontinence. She noted that he was “pretty much himself” once he regained consciousness. He was then brought by ambulance to the ED; a rhythm strip was acquired en route (see top image). Prophylactic transcutaneous pacer pads were placed by the emergency medical services (EMS) team.

Chain of Survival in CPR (AHA 2010)

To increase the chance of successful resuscitation following cardiac arrest, this requires an integrated set of coordinated, sequential actions represented by a chain of links. This is known as the Chain of Survival.

Why did CPR change from A-B-C to C-A-B?

The 2010 CPR Guidelines rearranged the order of CPR steps. Now, instead of A-B-C, which stands for airway and breathing first followed by chest compressions, the American Heart Association wants rescuers to practice C-A-B: chest compressions first, then airway and breathing. Some have asked, why did CPR change?

An ideal blood pressure?

A Patient referred by a family physician in the province asked me earlier this week, “What is an ideal blood pressure (BP)?” He expressed some degree of confusion that he gets different answers to this qeustion, depending on who he’s talking to.